Adding JDK 18
diff --git a/vars/jenkinsEnv.groovy b/vars/jenkinsEnv.groovy
index b0fbd4d..71b0ed1 100644
--- a/vars/jenkinsEnv.groovy
+++ b/vars/jenkinsEnv.groovy
@@ -38,64 +38,34 @@
         }
     }
     def jdkFromVersion(String os, String version) {
-        switch (os) {
-            case 'linux':
-                switch (version) {
-                    case '7':
-                        return 'jdk_1.7_latest'
-                    case '8':
-                        return 'jdk_1.8_latest'
-                    case '9':
-                        return 'jdk_1.9_latest'
-                    case '10':
-                        return 'jdk_10_latest'
-                    case '11':
-                        return 'jdk_11_latest'
-                    case '12':
-                        return 'jdk_12_latest'
-                    case '13':
-                        return 'jdk_13_latest'
-                    case '14':
-                        return 'jdk_14_latest'
-                    case '15':
-                        return 'jdk_15_latest'
-                    case '16':
-                        return 'jdk_16_latest'
-                    case '17':
-                        return 'jdk_17_latest'
-                    default:
-                        return null
-                }
-            case 'windows':
-                switch(version) {
-                    case '7':
-                        return 'jdk_1.7_latest'
-                    case '8':
-                        return 'jdk_1.8_latest'
-                    case '9':
-                        return 'jdk_1.9_latest'
-                    case '10':
-                        return 'jdk_10_latest'
-                    case '11':
-                        return 'jdk_11_latest'
-                    case '12':
-                        return 'jdk_12_latest'
-                    case '13':
-                        return 'jdk_13_latest'
-                    case '14':
-                        return 'jdk_14_latest'
-                    case '15':
-                        return 'jdk_15_latest'
-                    case '16':
-                        return 'jdk_16_latest'
-                    case '17':
-                        return 'jdk_17_latest'
-                    default:
-                        return null
-                }
-            default:
-                return null
-        }
+		switch (version) {
+			case '7':
+				return 'jdk_1.7_latest'
+			case '8':
+				return 'jdk_1.8_latest'
+			case '9':
+				return 'jdk_1.9_latest'
+			case '10':
+				return 'jdk_10_latest'
+			case '11':
+				return 'jdk_11_latest'
+			case '12':
+				return 'jdk_12_latest'
+			case '13':
+				return 'jdk_13_latest'
+			case '14':
+				return 'jdk_14_latest'
+			case '15':
+				return 'jdk_15_latest'
+			case '16':
+				return 'jdk_16_latest'
+			case '17':
+				return 'jdk_17_latest'
+			case '18':
+				return 'jdk_18_latest'
+			default:
+				return null
+		}
     }
     def mvnFromVersion(String os, String version) {
         switch (os) {